1. Articles from Wesley Chong

    1-4 of 4
    1. Quantification of the Posterior Cornea Using Swept Source Optical Coherence Tomography

      Quantification of the Posterior Cornea Using Swept Source Optical Coherence Tomography

      Purpose : We define optical coherence tomography (OCT) measurement parameters of the corneal endothelium/Descemet's membrane (DM) complex and peripheral transition zone (TZ) and describe these measurements in an ethnically Chinese population. Methods : OCT images of the anterior segment and iridocorneal angle were obtained from 129 healthy Chinese subjects (129 eyes), aged 40 to 81 years. The scleral spur (SS) and Schwalbe's line (SL) were identified in each image. Endothelium/DM diameter, referred to as endothelial arc length (EAL), is the SL-to-SL distance. The SS-to-SL distance encompasses the TZ and trabecular meshwork (TM). Since the TZ cannot be visualized ...

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    2. Comparison of Anterior Segment Optical Tomography Parameters Measured Using a Semi-Automatic Software to Standard Clinical Instruments

      Comparison of Anterior Segment Optical Tomography Parameters Measured Using a Semi-Automatic Software to Standard Clinical Instruments

      by Marcus Ang, Wesley Chong, Huiqi Huang, Wan Ting Tay, Tien Yin Wong, Ming-Guang He, Tin Aung, Jodhbir S. Mehta Objective To compare anterior segment parameters measured using a semi-automatic software (Zhongshan Angle Assessment Program, ZAP) applied to anterior segment optical coherence tomography (AS-OCT) images, with commonly used instruments. Methods Cross-sectional study of a total of 1069 subjects (1069 eyes) from three population-based studies of adults aged 40–80 years. All subjects underwent AS-OCT imaging and ZAP software was applied to determine anterior chamber depth (ACD), central corneal thickness (CCT), anterior and keratometry (K) – readings. These were compared to auto-refraction ...

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    3. Anterior Chamber Dimensions and Posterior Corneal Arc Length in Malay Eyes: An Anterior segment Optical Coherence Tomography Study

      Anterior Chamber Dimensions and Posterior Corneal Arc Length in Malay Eyes: An Anterior segment Optical Coherence Tomography Study

      Purpose: To provide normative data of corneal and anterior segment dimensions and a novel parameter, PCAL, in an adult Malay population. Methods: The current analysis is a sub-study of the Singapore Malay Eye Study (SiMES), a cross-sectional, population-based study of urban Malays aged 40-80 years. Subjects underwent ophthalmic and systemic examination, including imaging with anterior segment optical coherence tomography (AS-OCT). Ocular parameters were subsequently measured with the Zhongshan Assessment Program (ZAP): Anterior chamber depth (ACD), central corneal thickness (CCT), anterior and posterior corneal curvature (ACC and PCC), and posterior corneal arc length (PCAL), which is a novel parameter defined as ...

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    4. Anterior Segment Optical Tomography Study of the Cornea and Anterior Segment in Adult Ethnic South Asian Indian Eyes

      Anterior Segment Optical Tomography Study of the Cornea and Anterior Segment in Adult Ethnic South Asian Indian Eyes

      Purpose. To report normative results of anterior segment and corneal biometric parameters and their associations in ethnic South Asian Indian adults. Methods. The Singapore Indian Eye Study (SINDI) is a cross-sectional, population-based study of ethnic South Asian Indians aged 40-80 years. Subjects underwent ophthalmic and systemic examination, including imaging with anterior segment optical coherence tomography (AS-OCT). Parameters were derived using the Zhongshan Assessment Program (ZAP): anterior chamber depth (ACD), central corneal thickness (CCT), anterior and posterior corneal curvatures (ACC and PCC). Posterior corneal arc length (PCAL) is a novel parameter defined as the arc distance between scleral spurs on the ...

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    1-4 of 4
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  2. Topics in the News

    1. (4 articles) Singapore Eye Research Institute
    2. (4 articles) Jodhbir S. Mehta
    3. (3 articles) Tin Aung
    4. (3 articles) Tien Yin Wong
    5. (2 articles) University of Melbourne
    6. (2 articles) Massachusetts General Hospital
    7. (1 articles) Duke University
    8. (1 articles) Harvard University
    9. (1 articles) The Chinese University of Hong Kong
    10. (1 articles) University of Miami
    11. (1 articles) VU University Amsterdam
    12. (1 articles) David A. Boas
    13. (1 articles) Brett E. Bouma
    14. (1 articles) Johannes F. de Boer
    15. (1 articles) Frank D. Verbraak
    16. (1 articles) Apollo Medical Optics
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    Anterior Segment Optical Tomography Study of the Cornea and Anterior Segment in Adult Ethnic South Asian Indian Eyes Anterior Chamber Dimensions and Posterior Corneal Arc Length in Malay Eyes: An Anterior segment Optical Coherence Tomography Study Comparison of Anterior Segment Optical Tomography Parameters Measured Using a Semi-Automatic Software to Standard Clinical Instruments Quantification of the Posterior Cornea Using Swept Source Optical Coherence Tomography Optical Coherence Tomography: Critical Tool to Manage Expectations after Cataract Extraction Improving the characterization of ex vivo human brain optical properties using high numerical aperture optical coherence tomography by spatially constraining the confocal parameters Choroidal, macular and ganglion cell layer thickness assessment in Caucasian children measured with spectral domain optical coherence tomography Examination of retinal vascular density changes via optical coherence tomography angiography in patients with glaucoma 3D reconstruction of coronary artery bifurcations from coronary angiography and optical coherence tomography: feasibility, validation, and reproducibility Age- and refraction-related changes in anterior segment anatomical structures measured by swept-source anterior segment OCT The evaluation of juvenile ocular hypertension by optical coherence tomography angiography Superficial capillary perfusion on optical coherence tomography angiography differentiates moderate and severe nonproliferative diabetic retinopathy